Add explanation for pence calculation in 3-to-pounds.js

Author: moses77-boop

Sprint-2/3-mandatory-interpret/3-to-pounds.js

@@ -48,4 +48,6 @@ console.log(`£${pounds}.${pence}`);
 //    then 'paddedPenceNumberString.substring(3 - 2)' becomes 'paddedPenceNumberString.substring(1)': this means grab everything from position '1' of the string to the end.
 //    That is -> '399.substring(1)' becomes '99' 
 //    '.padEnd(2, "0") is another method that ensures the string is at least 2 characters long and adding '0' to the end if it's too short.
-//    'const pence' would be assigned the new value: '99'
+//    'const pence' would be assigned the new value: '99'
+
+// 6. console.log(`$)